31063961 has 4 divisors (see below), whose sum is σ = 32414592. Its totient is φ = 29713332.

The previous prime is 31063957. The next prime is 31063969. The reversal of 31063961 is 16936013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16936013 = 31 ⋅546323.

It is not a de Polignac number, because 31063961 - 2² = 31063957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31063969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675281 + ... + 675326.

It is an arithmetic number, because the mean of its divisors is an integer number (8103648).

Almost surely, 2^31063961 is an apocalyptic number.

It is an amenable number.

31063961 is a deficient number, since it is larger than the sum of its proper divisors (1350631).

31063961 is a wasteful number, since it uses less digits than its factorization.

31063961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350630.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 31063961 is about 5573.5052704739. The cubic root of 31063961 is about 314.3539661196.

Adding to 31063961 its reverse (16936013), we get a palindrome (47999974).

The spelling of 31063961 in words is "thirty-one million, sixty-three thousand, nine hundred sixty-one".